/Engine/Plugins/Runtime/GeometryCache/Source/GeometryCache/Classes/GeometryCacheTrackStreamable.h
Add a GeometryCacheMeshData sample to the Track
void
void AddMeshSample ( const [FGeometryCacheMeshData](API\Plugins\GeometryCache\FGeometryCacheMeshData) & MeshData, const float SampleTime, bool bSameTopologyAsPrevious )